The Environmental Evaluation of Toxic Metal of Al content changing in Industrial Zones (Case Study: some of industrial zones in Kerman province)

Subject Areas : environmental management

Hassan Salari ¹ , Hossein Mozafai ² , Khosrow Manoocheri Kalantari ³ , Masoud Torkzadeh ⁴ , Farzin Naseri ⁵

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Received: 2007-03-05 Accepted : 2007-06-11 Published : 2011-04-03

Keywords: Aluminum, Exchangeable Aluminum, environmental toxicity, soil acidity, industrial zone,

Abstract :

Recognition and evaluation of main factors of Aluminum toxicity in different regions (especially industrial zones) is important. In recent research, in order to evaluate the effects of industrial zones on environmental Al3+ content, we carried out sampling from soil, plant and industrial wastewater in six industrial zones of Kerman province (including Kerman Cement factory and Barez Tire factory, Sarcheshmeh Copper Complex, CSP, Industrial Zone No.1 and Khazra industrial zone) and a non industrial zone (control). Soil samples were taken from 30cm depth, plant samples were sampled in these zones for 10 replicates. After sampling and sample preparation, the parameters such as soil pH, soil exchangeable Aluminum, total Aluminum of soil, plant Aluminum content, industrial wastewater pH and industrial wastewater Aluminum were determined in lab. The soil exchangeable Aluminum content was determined by extracting with 1N KCl and total Aluminum was measured with acid digestion and atomic absorption method. Soil and industrial wastewater pH was measured with pH meter. The data was analyses by one-way ANOVA method (SPSS 10.0 software) statistically. The results showed that the amount of soil, industrial wastewater and plant Aluminum content increased significantly in two industrial zones including Sarcheshmeh Copper Complex and CSP when compared with environmental Protection Agency (EPA) standards and other zones. Soil and industrial wastewater pH also significantly decreased in these two zones decrease compared with other zones and control (pH of soil samples equaled with critical range of pH=5 approximately). We didn observe increase in total Aluminum amount of soil in these zones when compared with other zones. Therefore increasing of the soil exchangeable Aluminum content in these two zones indicated that the required conditions for Aluminum realizing from soil particles is available. Accordingly, releasing industrial wastewater and pollutant gases (sulphoure components) from industrial zones (Sarcheshmeh Copper Complex and CSO) causes increasing exchangeable Aluminum soil slowly and accumulates within plants. So, the possibility of Aluminum toxicity increases in agricultural and residential regions. Therefore, we should concern controlling, evaluation and management of this important environmental problem.